My world is sitting on the couch, how do you get up?

Are you talking about a game called Minecraft? That is, minecraft, furniture mod can get up by sitting on the couch and pressing shift.

Sitting on the couch, there are two situations.

You're using a minecart to get into the stairs, which is the same old way as Shift (as long as you don't change the keys or have conflicting keys).

This is the sofa in the furniture mod, and you can also press shift down all the things that the mod rides on are shifted down by pressing the sneak key.

In the furniture mod, press the right button on the couch to sit down and press left shift up.

Just press shift to try?

Press shift, generally use mod riding items to press shirt to get up.

Try by pressing left shift.

Furniture mods?

It should be the jump button or the crouch button.

Press shift (the default setting is (press sneak)) and you're good to go.

Hold down Left Shift, otherwise set the sneak key in the controls.

Press shift, and if that doesn't work, look at the sneaking button in your key settings.